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Looking for Magenta Dyes
Does anyone know of any suppliers that make a magenta or pink dye, that is safe to use on skin products. FD&C Red #3 is now banned. D&C Red #33 is not magenta/pink enough. I am having a problem with making bright purple shades. Any help would be great.
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9 Replies
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@Doaneventry, what specifically are you making?
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A lotion, sugar scrub, and a mask; hydrophilic systems. I have used Blue #1 with all of the water soluble FD&C Reds. The only time I was able to produce a bright purple was using red #3.
I am currently experimenting with D&C Violet 2 EXT, but its solubility in water is not so great. I would make 0.002 g/ml solution of D&C Violet Pigments in water. Even after hours of mixing you can still see lots of agglomerates of the pigment at the bottom of my beaker. I’d pipette the top layer of this solution which shouldn’t have agglomerates, to a desired amount into my sugar scrub base. The sugar scrub is mostly glycerin. After a day of letting it set you can see specks of what i presume would re-agglomerate of pigments forming spots in the product.
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Today I was looking at some of the lakes I had sampled. I notice the D&C red 30 Aluminium lake was a bright pink (something I needed). I knew lakes don’t ever dissolve in water, so I thought maybe this will disperse well in a surfactant and then try mixing the surfactant color mixture into water. I used P-20. It worked.
I tried quick experimental mixtures with the red 30 lake with blue #1 or Violet 2. The color I needed worked for Violet # 2.
1 issue I had with this is that breaking down the red 30 lake pigments was very difficult. I don’t really work with lakes, but I guess you normally have to mill lakes to even disperse them? I thought maybe if I had place the red 30 lake pigments directly into the sugar scrub the sugar will grind down the lake itself through mixing ~ it worked. However, I don’t have the means to do this if I were to put this color mixture into a lotion.
2. Violet #2 still re-agglomerates.
This would all save me so much time if a pink dye exist
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you can get D&C Red 30 as a dye, as opposed to a lake; it’s soluble in polar oils
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Have you tried Anthocyanins (grape skin extract) for a purple color? https://www.iacmcolor.org/safety-of-color/natural-colors/anthocyanins/
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@Bill_Toge My supplier has a “cheat sheet” and it shows D&C Red 30 to be insoluble in all the polar solvents shown. I’ll sample it and see if that is really the case.
@ozgirl I have not. It seems like this is designed for food usage. Is this okay in cosmetics?
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You would need to check your local regulations. It is ok in Europe but I am not sure about the USA or other locations.
http://ec.europa.eu/growth/tools-databases/cosing/pdf/COSING_Annex%20IV_v2.pdf -
@Doaneventry the lake is insoluble; the dye is not
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Hi Doaneventry are you heating up the water to dissolve the D&C Violet dye? In our lab, the water needs to be heated to about 85C before it dissolves completely.
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